llvm-6502/include/llvm/Support/DOTGraphTraits.h
2002-10-17 00:16:39 +00:00

93 lines
3.5 KiB
C++

//===-- Support/DotGraphTraits.h - Customize .dot output -------*- C++ -*--===//
//
// This file defines a template class that can be used to customize dot output
// graphs generated by the GraphWriter.h file. The default implementation of
// this file will produce a simple, but not very polished graph. By
// specializing this template, lots of customization opportunities are possible.
//
//===----------------------------------------------------------------------===//
#ifndef SUPPORT_DOTGRAPHTRAITS_H
#define SUPPORT_DOTGRAPHTRAITS_H
#include <string>
/// DefaultDOTGraphTraits - This class provides the default implementations of
/// all of the DOTGraphTraits methods. If a specialization does not need to
/// override all methods here it should inherit so that it can get the default
/// implementations.
///
struct DefaultDOTGraphTraits {
/// getGraphName - Return the label for the graph as a whole. Printed at the
/// top of the graph.
///
static std::string getGraphName(const void *Graph) { return ""; }
/// getGraphProperties - Return any custom properties that should be included
/// in the top level graph structure for dot. By default, we resize the graph
/// to fit on a letter size page.
///
static std::string getGraphProperties(const void *Graph) {
return "\tsize=\"7.5,10\";\n"; // Size to fit on a page
}
/// getNodeLabel - Given a node and a pointer to the top level graph, return
/// the label to print in the node.
static std::string getNodeLabel(const void *Node, const void *Graph) {
return "";
}
/// If you want to specify custom node attributes, this is the place to do so
///
static std::string getNodeAttributes(const void *Node) { return ""; }
/// If you want to override the dot attributes printed for a particular edge,
/// override this method.
template<typename EdgeIter>
static std::string getEdgeAttributes(const void *Node, EdgeIter EI) {
return "";
}
/// getEdgeSourceLabel - If you want to label the edge source itself,
/// implement this method.
template<typename EdgeIter>
static std::string getEdgeSourceLabel(const void *Node, EdgeIter I) {
return "";
}
/// edgeTargetsEdgeSource - This method returns true if this outgoing edge
/// should actually target another edge source, not a node. If this method is
/// implemented, getEdgeTarget should be implemented.
template<typename EdgeIter>
static bool edgeTargetsEdgeSource(const void *Node, EdgeIter I) {
return false;
}
/// getEdgeTarget - If edgeTargetsEdgeSource returns true, this method is
/// called to determine which outgoing edge of Node is the target of this
/// edge.
template<typename EdgeIter>
static EdgeIter getEdgeTarget(const void *Node, EdgeIter I) {
return I;
}
/// addCustomGraphFeatures - If a graph is made up of more than just
/// straight-forward nodes and edges, this is the place to put all of the
/// custom stuff neccesary. The GraphWriter object, instantiated with your
/// GraphType is passed in as an argument. You may call arbitrary methods on
/// it to add things to the output graph.
///
template<typename GraphWriter>
static void addCustomGraphFeatures(const void *Graph, GraphWriter &GW) {}
};
/// DOTGraphTraits - Template class that can be specialized to customize how
/// graphs are converted to 'dot' graphs. When specializing, you may inherit
/// from DefaultDOTGraphTraits if you don't need to override everything.
///
template <typename Ty>
class DOTGraphTraits : public DefaultDOTGraphTraits {};
#endif